We conduct regular classes with the interval of two houres. First batch 8am to 10 am, Second batch 11 am to 1 pm, Third batch 3 pm to 5 pm, Fourth batch 6.30 pm to 8.30 pm ... Homework is must during the class.
If any student wants to repeat any part of the course, for life time it's free. Since there is a sacread relation between teacher and student, then after he or she is never charged for the same course.